https://rodgrid.io/blog Product news, feature deep dives, and engineering notes from the team building RodGrid. en https://rodgrid.io/blog/cache-stampede-hides-behind-your-hit-rate https://rodgrid.io/blog/cache-stampede-hides-behind-your-hit-rate Sun, 23 Aug 2026 00:00:00 GMT A 99% cache hit rate means the database behind it is sized for 1% of your traffic. Here is what happens the moment that assumption stops holding, and how to see it on a diagram before it happens. https://rodgrid.io/blog/retry-storms-and-the-fix-that-becomes-the-failure https://rodgrid.io/blog/retry-storms-and-the-fix-that-becomes-the-failure Sat, 22 Aug 2026 00:00:00 GMT Retrying is the standard answer to a transient error. When the error is saturation rather than bad luck, the retry adds load at the exact moment the system needs less of it. https://rodgrid.io/blog/losing-an-availability-zone https://rodgrid.io/blog/losing-an-availability-zone Fri, 21 Aug 2026 00:00:00 GMT Three zones does not mean you can lose one for free. It means each surviving zone has to absorb half the traffic instead of a third — and the headroom for that is a number you either bought or did not. https://rodgrid.io/blog/read-replica-or-cache https://rodgrid.io/blog/read-replica-or-cache Thu, 20 Aug 2026 00:00:00 GMT Both take read load off the primary database, and they are not interchangeable. One scales the number of queries you can serve; the other removes the query entirely. Picking wrong is how a design ends up with both.